Hulling-machine



(No Model.)

H. THAYER;

HULLING MACHINE.

Patented Apr. 26, 1887.

m F o I Z WITNESSES: KM sfVl/EA/TOI? J flZr fiZOZ, By W ATTORNEY UNITED STATES PATENT OFFICEQ.

HARLLHV HFTHAYER, OF BOSTON, MASSACHUSETTS.

HULLING-MACHINE.

EPECIFICATION- forming part of Letters Patent No. 361,733, dated April 26, 1887.

Application filed AprilQS, 1886. Serial No. 200.476. (No model.)

To all whmn it may concern:

Be it known that I, HARLOW H. THAYER, of Boston, in the county of Suffolk'and State of Massachusetts, have invented certain new and useful Improvements in Hulling -Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to hulling-machines designed for use'in hulling rice; but it can be con structed and used for removing the husks from coffee or for removing the integument from kernels of many kinds.

The object of my invention is to produce a machine that will hull rice effectually and rap idly and with great economy.

Figure 1 represents in elevation and partial section my hulling-machine. Fig. 2 is an enlarged vertical cross-section showing the construction and arrangement of the hullers on lines 2 z, z z of Fig. 1. Figs. 3 and 4 illustrate in enlarged section and plan one of the hulling-points.

A is a hopper or tunnel, provided with an.

opening, a, and the gate B, having the stops b and b,all constructed and arranged in the usual manner. The hopper is secured to the elbow O, leaving a space, R, between the top of the elbow and the bottom of the gate about equal to the area of the inside of the elbow O, by means of the supports 0 and c, which have sufficient width and strength,when properly riveted to the elbow and hopper, as shown, to properly support the hopper. The elbow O is properly secured and held in position by the support d. The hullers D and D are connected with the exhaustingfau E, provided with an exhaust-outlet,K, which is represented in front elevation only, and is of a class known as the Sturtevant EXhausting-Fan, and are supported, respectively,by the supports d and d. The huller D, which is a duplicate of the huller D, is shown in partial longitudinal section, and is constructed as follows:

The conico-cylindrical interior sections, F and F, are joined together at their bases, and are made up of the smooth inner casing, G, as shown in Fig. 2, which is made tight, andthe outer covering, H, both being secured together and held centrally within the outer casing by means of the four braces 6 near one end and by a similar number and style of braces, f, near the other end.

The frustum -shaped sections I and J are joined together at their bases, and are provided with nozzles L and M, and are made up of a smooth outer covering, N, as shown in Figs. 1 and 2, which is made tight, and an inner casing, 0, both being suitably secured together.

The covering H and easing O are provided. Y

with a large number of hulling-points, as represented in Fig. 1. In Fig. 2 they are repre sented on an enlarged scale. ()ne of the socalled hulling-points is shown quite full size in section and plan in Figs. 3 and 4, re spectively.

All of the parts described are to be made of suitable material, the covering H and casing 0 being made preferably of sheet-steel, and the inner casing, G, and the outer covering, N, are preferably made of sheet-iron.

My machine,when ready for use,is connected as follows, all as shown in Fig. 1: The huller D is connected with the inlet of the exhaustfan E. The huller D is connected with the huller D and the elbow O, to which is connected the hopper A, which is connected with the huller D, the hullers and hopper being supported as previously stated.

The operation of my invention is as follows: All the parts having been connected as previously stated, the opening a of the hopper A is closed by means of the gate B. The exhausting-fan E is then set in operation by means of power applied to the pulley P from a source of supply by means of a belt, all in the usual manner. The blower is run at such a speed asmay be necessary to produce the most effective current'of air through the space R and elbow O, as shown in Fig. 1 by curved arrows, through the huller D, as shown by arrows, through the huller D, and through the blower E. The hopper being filled with rice to be hulled, and while a sufficient current of air is established, the unhulled rice is admitted in suitable quantities into the elbow O by the correct manipulation of the gate B, where it mingles with the. current of air, and is subjected to attrition by striking against the hulling-points of the hullers D and D, the hulls being thus removed in a remarkably rapid and effective manner. After passing through the hullers, the mixture of hulled rice and hulls is carried through the blower and is separated in any Well-known manner bymeans of separators or otherwise.

' The construction of the huller D, as previously described, is such that the passage provided through it, as shown in Fig. 1 and as marked with arrows, is of an angular nature as regards the direction taken by the rice when passing through the huller. ,The object of this ing-fan, and-at the outlet of the same fan What Iclaim as new, and desire to secure 25 by Letters Patent, is-

1. In a hulling-machine, means for producing a current of air, in combination with the hullers D and D, hopper A, arranged to leave an opening, R, and gate B, formed with opening a, substantially as described.

2. In a hulling-machine, the conico-cylindrical sections F and F, provided with the braces eandf, in combination with the frustum-shaped sections I and J, provided with nozzles L and M, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence oftwo subscribing witnesses, on this 9th day of April, A. D. 1886.

HARLOWV H. TH AYER.

Witnesses:

E. FRANK VVooDBURY, JAcoB NASCHOLD. 

